525sc
#1
Registered
Thread Starter
Join Date: Nov 2015
Location: riverside ca
Posts: 16
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
Im in need of the splinned upper pulley blue supercharger is older 92' sleek mercruiser small diameter 2.78 in or where to look please help asap summers comin I'm running a chiller so has to be the small one I think WOULD ALSO BE INTERESTED IN SPARE NOSE ASSEMBLY W/SAME SPLINNED SHAFT
Last edited by charliew; 01-02-2016 at 03:22 PM.
#3
Registered
Join Date: Nov 2005
Location: Wayland, MI
Posts: 387
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
I changed out my splined shaft to a shaft with a keyway. It was the style used on automotive blowers. You can then use off the shelf pulleys from Summit or Jegs. It worked great.
#5
Registered
Join Date: Nov 2005
Location: Wayland, MI
Posts: 387
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
FWIW, Merc put those splined shafts on their spec 177 blowers so no one could change the pulley and grenade the engine under the 90 day warranty. When I got my new to me 525sc powered boat in 2005, I bought a 2.85 pulley with splines to replace the stock 3.25 pulley and the fit was so bad I could not run it. Then I bought another, it was the same. That's where the keyway shaft comes in. It has a much better fit and pulleys are easy to find. I ran it for 10 years and had no problems. Look at the Weiand 91180 kit.